Evo Surgix Watson Dermatome Adjustable Skin Grafting Knife 30.5cm features a total overall length of 30.5cm. This manual dermatome includes a polished stainless-steel guard and a durable, precise thickness adjustment system—simpler and more rigid than the Humby Braithwaite model. The depth of cut is easily adjustable through rod rotation. Expertly handcrafted from premium German stainless steel with a satin and sand finish.